//
//  ViewController.m
//  07- UIViewControllerLifeCycle
//
//  Created by dllo on 16/7/22.
//  Copyright © 2016年 dllo. All rights reserved.
//

#import "ViewController.h"
#import "FirstViewController.h"

@interface ViewController ()

@end

@implementation ViewController
#pragma mark - Life Cycle
  //loadView 与 viewDidLoad 只走一次
- (void)loadView {
    [super loadView];
    NSLog(@"%@-----%s", [self class], __FUNCTION__);
}

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    NSLog(@"%@-----%s", [self class], __FUNCTION__);
    self.view.backgroundColor = [UIColor redColor];
    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemSave target:self action:@selector(barButtonClicked:)];
}
// 视图将要出现时， 就会调用 ， 只要有一点出现
- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    NSLog(@"%@-----%s", [self class], __FUNCTION__);
}
// 视图完全出现时， 就会调用
- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
    NSLog(@"%@-----%s", [self class], __FUNCTION__);
}
// 视图将要消失时， 就会调用 只要有一点消失
- (void)viewWillDisappear:(BOOL)animated {
    [super viewWillDisappear:animated];
    NSLog(@"%@-----%s", [self class], __FUNCTION__);
}
// 视图完全消失现时， 就会调用
- (void)viewDidDisappear:(BOOL)animated {
    [super viewDidDisappear:animated];
    NSLog(@"%@-----%s", [self class], __FUNCTION__);
}

#pragma mark - buttonClicked
- (void)barButtonClicked:(UIBarButtonItem *)barButtonItem {
    FirstViewController *first = [[FirstViewController alloc] init];
    [self.navigationController pushViewController:first animated:YES];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end
